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Content archived on 2024-04-16

IMPURITIES IN COPPER

Objective



The purity of electrolytically refined copper (e.g. for use in electric cables) must comply with internationally agreed norms which require the determination of 19 elements: Ag, As, Bi, Cd, Co, Cr, Fe, Mn, Ni, O, P, Pb, S, Sb, Se, Si, Sn, Te and Zn. Most of these are routinely determined by optical emission spectrometry, but the results of various laboratories do not always agree well. Considering the economic importance, industry has requested the BCR to certify reference materials.

RESULTS

Two reference materials have been certified for 15 elements:
CRM 074: electrolytically refined copper
CRM 075: copper with added impurities (levels close to specified maxima)
A separate reference material (CRM 017) was certified for S and P (10 resp. 7 mg/kg).
Certification reports: EUR 12318 (1989) (CRM 017)
EUR 14055 (1992) (CRMs 074 and 075)

Programme(s)

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Topic(s)

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Call for proposal

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Funding Scheme

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CSC - Cost-sharing contracts

Coordinator

BICC plc
EU contribution
No data
Address

Prescot
United Kingdom

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Total cost

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Participants (19)

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